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Thyroid function test |
| Test | Thyroid function test |
| Indication | Hyperparathyroidism and hypothyroidism |
| Physiology | A butterfly like gland with two lobes extending around trachea and produces thyroxine.It exists as total T4,T3,free T4 and TSH.It affects cellular growth and metabolism |
| Normal Range | T4-60-140nmol/L, T3-1.2-1.8nmol/L, TSH-0.1-6IU/L |
| Interpretation | Total T4-Increased levels are seen in graves disease,cancer of thyroid as symptoms of hyperthyroidism.low lwvels are seen in hypothyroidism whose symptoms are myoxyedema hashmito disease and pituatry disorders .T 3 -Increased levels are seen in hyperthyroidism and decreased levels are seen in hypothyroidsm.TSH-High in hypothyroidism and low in hyperthyroidism |
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